The objective of the project is to control the speed of the vehicles at the speed limited zone using CAN protocol.
The main purpose of doing this project is to prevent accidents at the speed limited areas such as schools, hospitals, etc. The system comprises of an RFID reader and PIC microcontroller using CAN protocol.
Two RFID tags are placed at the two ends of the speed limited zone. The RFID reader has to be fixed at each vehicle, such that the vehicle crossing the zone can read the tags. Each tag consists of a 12 digit number representing the zone starting and finishing ends. The RFID reader reads the 12 digit number while crossing the tags and transmits the corresponding tag number to the controller through the CAN bus.
The CAN bus is used to avoid the data corruption at the system vibrations. While the vehicle crosses the first tag, the reader reads the tag number and provides it to the controller. Then the controller limits the speed of the vehicle to the zone limit speed. And while the vehicle crosses the second tag, the reader reads the tag number and provides it to the controller. Then the controller releases the speed of the vehicle.
* The RFID tags must be fixed at the two ends of the speed limited zone. * The RFID reader is interfaced to the PIC controller and is fixed to the vehicle such that it reads the tags fixed at the road side. * The CAN bus is used as the interfacing medium to the controller. * The setup is fixed to the vehicle in such a way that the controller can control the DC motor speed.